DE69729037T2 - Cheap, automatic and transparent access procedure and protocol for telecommunication service providers via ISDN - Google Patents

Description

The present invention relates to a method, a protocol and a device for telecommunications, in particular voice telecommunications, between participants of a Telekommunikationswählnetzes (Integrated service digital network [or ISDN] or public Telephone network [or PSTN]).

The technical field of the invention is that of telecommunications.

The invention takes place in digital or graphic data or telecommunications, for example when transferring of files with a throughput of 64 kbit per second, or else in the transfer of remote copies with a throughput of 9600 bits per second as well in the transfer of voice messages, d. H. in telephony application.

Establishing a telephone connection between a calling party and a called party takes place by means of one operator or several operators, for example Owner or operator of a voice telecommunications network, and possibly through an intermediate station, sometimes called a communications service provider referred to as; this term generally refers to an intermediary, the "bulk" telephone connections with an operator, owner of a public network, at preferential tariff conditions shopping to "im Small "to individual Resell customers or participants.

• – Ein erster Zugangsmodus besteht für den Einzelkunden oder -teilnehmer darin, eine permanente Direktleitung mit dem Kommunikationsdienstanbieter zu mieten, der durch Überwachen insbesondere des Verkehrs (der Menge) von über die Mietleitung laufenden Informationen mit seinem Kunden (Einzelteilnehmer) abrechnet; dieser Zugangsmodus ermöglicht ein gutes Sicherheitsniveau zur Identifikation des anrufenden Teilnehmers;
• – ein weiterer Zugangsmodus beruht darauf, Teilnehmern einen an ein herkömmliches Fernsprechwählnetz angeschlossenen Sprachserver zur Verfügung zu stellen; der Sprachserver ermöglicht einem den Kommunikationsdienstanbieter anrufenden Teilnehmer, sich durch seine Kundennummer oder seine Buchungskontonummer zu identifizieren, sich eventuell durch eine Codenummer zu identifizieren, und unter Verwendung der Tasten (mit Sprachfrequenz) seines Telefonhörers die Nummer des gewünschten Endgesprächsteilnehmers zu wählen; einige Vorrichtungen ermöglichen, diese Vorgänge zu automatisieren und berechtigen den Anrufenden, direkt zu dem gewünschten Teilnehmer zu wählen, wobei somit die Rufergonomie gewahrt wird;
• – ein dritter Zugangsmodus durch automatischen Rückruf erfordert den Anruf des Kunden (oder anrufenden Teilnehmers) bei der Gesellschaft für automatischen Rückruf, die an ein Fernsprechwählnetz [PSTN oder ISDN] angeschlossen ist; bei diesem Zugangsmodus legt der Teilnehmer seinen Hörer nach Anrufen des Dienstanbieters wieder auf und wartet, daß dieser Dienstanbieter (d. h. diese Gesellschaft für automatischen Rückruf) ihn zurückruft.

Service providers in telecommunications (especially voice telecommunications) offer their individual customers or subscribers communication access modes (especially telephone access modes), which are generally of the following three types:

• - A first access mode for the individual customer or subscriber is to rent a permanent direct line with the communications service provider, who bills with his customer (individual subscriber) by monitoring, in particular, the traffic (the quantity) of information passing through the leased line; this access mode enables a good level of security to identify the calling subscriber;
• A further access mode is based on providing subscribers with a voice server connected to a conventional telephone dialing network; the voice server enables a subscriber calling the communications service provider to identify himself by his customer number or his booking account number, possibly to identify himself by a code number, and to dial the number of the desired final subscriber using the keys (with voice frequency) of his telephone receiver; some devices enable these processes to be automated and authorize the caller to dial directly to the desired subscriber, thus maintaining call ergonomics;
• A third automatic callback access mode requires the customer (or calling party) to call the automatic callback company connected to a PSTN or ISDN telephone network; in this access mode, the subscriber hangs up his handset after calls from the service provider and waits for this service provider (ie this company for automatic callback) to call him back.

These different access modes have disadvantages; because, in order to be profitable, the cost of a leased direct line requires a large amount of telecommunications and, consequently, a sufficiently high amount of traffic to enable individual customers to benefit from prices that are lower than those offered by locally available operators; in addition, access to the provider equipped with a voice server changes the usage habits of the telephone network, since the dialing to be carried out by the calling subscriber differs from the direct dialing of the public dialing level normally used by the operator of the network; furthermore, this access mode does not offer a sufficient level of security for the communication service provider with regard to the identification of the calling subscriber, since the account and / or code number of the calling customer is stolen and can be used by an unauthorized third party; In its automated version, a handicap of the voice server lies in the charge calculation for ineffective or missed calls (busy, no answer, saturation etc.), at the expense of the calling subscriber or the intermediate station, if access is via a toll-free number (green Number 0 800 in France) or both, if access is via a shared charge number (Azure number 0 801 or Indigo number 0 802 in France), as a common connection is established to exchange information before the useful message to enable the call parameters of the requested end user (signaling within the audio band). In some recent cases, the ineffective calls represent 10-15% of the call subscriber's call budget that uses the intermediary communications service provider; in the access mode by automatic call back from a service provider connected to a telephone network or an integrated service digital network, the call back method has a significant disadvantage, particularly associated with the fact that the caller is waiting for the call back must be done by the intermediary or service provider. In the meantime, the caller can be called by a third party or the access to the company's facility, in the case of a PABX, can be saturated.

The aim of the present invention is es, an improved mode of access to a communications service provider (or communications operator).

An object of the invention is in particular an access mode for propose a calling party through a service provider or an intermediate station on automatic and for the calling subscriber transparent way, d. H. without the calling party must change their habits for using the telephone switched networks with a called party step into telecommunications (especially voice telecommunications) would like to.

Another object of the invention is to allow to guarantee the telecommunications service provider a high level of security with regard to the identification of the calling customers.

The integrated digital networks (ISDN) have features that are supported by numerous ISO, CCITT / ITU-T standards limited are; these networks are in several transmission channels from Organized type B and D and their corresponding protocols; the B channels (Line fashion) are mainly for transmission the one to be transmitted Determined messages or dates; the D channels (packet mode) are mainly for transmission of signaling information determined for the management of B channels and for delivery of service features are required; the norms also define different interface types - including those as T and the interfaces designated as E - define the reference points, which enable structure the network (architecture) and those of this network to interconnect educational institutions.

• – das Patent US 5.425.085 beschreibt eine Vorrichtung zur Telekommunikationsumleitung; die beschriebene Vorrichtung ist speziell vorgesehen, um zwischen einer analogen Telefonendeinrichtung und einem analogen Netz vom Typ STN (Fernsprechwählnetz) zwischengeschaltet zu werden;
• – die internationale Anmeldung WO 88/07797 beschreibt ein zwischen einer Telefonendeinrichtung und dem Netz zwischengeschaltetes Gehäuse; das Gehäuse ist an einen Computer angeschlossen;
• – die internationale Anmeldung WO 94/28683 beschreibt Schaltkreise zum Erzeugen von Preissignalen und Schaltkreise zur Auswahl eines Telekommunikationsbetreibers in Abhängigkeit von dem Preissignal; Es sind außerdem Telekommunikationssysteme bekannt, bei denen eine Kurzwahlnummer oder Gattungsnummer eines Dienstes (private Wählebene) durch eine Nummer der öffentlichen Ebene, die aus einem Datenspeicher oder einer Datenbasis ausgewählt wird, ersetzt wird:
• – das Patent US 5.272.748 beschreibt ein System, um zwischen einer öffentlichen Telefonzelle und einem Informationssprachserver, oder aber einer Fernsprechvermittlungsstelle einer Taxigesellschaft (private Wählebene) eine telefonische Verbindung herzustellen;
• – die Patentanmeldung EP 493 896 beschreibt ein System zur Auswahl der Rufnummer eines Geschäftes nahe des Wohnortes des anrufenden Teilnehmers für die Herstellung einer Verbindung anhand einer Kurzwahlnummer, die mehreren Geschäften gemein ist (Einheitsnummerndienstbereich wie die grüne Nummer 0 800 in Frankreich).

Various automatic devices for choosing a telecommunications operator are known to minimize costs and / or to optimize the quality of telecommunications:

• - the patent US 5,425,085 describes a device for telecommunication diversion; the device described is specifically designed to be interposed between an analog telephone terminal and an analog network of the type STN (telephone switched network);
• - the international application WO 88/07797 describes a housing interposed between a telephone terminal and the network; the housing is connected to a computer;
• - International application WO 94/28683 describes circuits for generating price signals and circuits for selecting a telecommunications operator depending on the price signal; Telecommunications systems are also known in which a speed dial number or generic number of a service (private dialing level) is replaced by a number of the public level which is selected from a data store or a database:
• - the patent US 5,272,748 describes a system for establishing a telephone connection between a public telephone booth and an information voice server, or a telephone exchange of a taxi company (private dialing level);
• - the patent application EP 493 896 describes a system for dialing the number of a store near the home of the calling party for connection using a speed dial number that is common to several stores (unit number service area such as the green number 0 800 in France).

None of these documents describe or suggests for redirecting a connection and for the very fast, cheap and reliable Establishing a connection to use the functions of the ISDN networks.

The invention therefore relates to a Procedure for telecommunications between any first subscriber - the so-called calling subscriber - and any third party - that so-called called participants - with the first and third Participants about an analog end line (STN) or a digital end line (ISDN) are connected to an (automatic) telephone network, the network having a so-called intermediary switch; according to the invention the number of the third party noted as Z is transferred via the D channel for transmit the signaling of the ISDN network to the intermediate station.

For this purpose, the intermediate station equipped with an ISDN interface, via which you can call the number Z receives.

Accordingly, according to a first aspect of the invention, it is sufficient to equip the intermediate station with one or more ISDN PABX, which is or are used here as a transit node, while it is generally used, by several at a private, common station to operate terminal equipment; A PABX, of course, has a small capacity compared to the large public telephone exchanges, but it has the advantage of being very cheap, in particular due to the fact that this type of exchange does not have channels for the enriched signaling tion, such as the SS7 channel of the ITU-T, which can be found within the public networks.

The invention enables societies in particular who already have means of transmission feature, such as in particular optical fiber or directional beam connections (with regional, national or international character), such as Example railway companies, with one on the purchase cost limited investment as a communications operator or service provider for the Connection and to set up the commissioning of ISDN-PABX.

For this purpose, the intermediate station of the Service provider about an ISDN connection to a telecommunications center of a public switched telephone network be connected; being the public Telephone network is characterized by its ability is at the end part (or local line loop) with the callers to use the number X; the intermediate station corresponds to one participant of the national or regional network, and consequently of course you become one Allocated participant number noted as Y.

If any calling party, connected to the automatic telecommunications network, a telecommunication with any called subscriber who connected to the automatic telecommunications network would like to, so choose he the usual on his device full Number Z, d. H. the number (of the public dialing level under consideration) that is assigned to the called subscriber; preferably the callers a code (such as one or more Digits) and immediately afterwards the number Z, or accordingly the number Z, where the code is a selected code for the pass of telecommunications over represents a particular stopover; so is the digit or the prefix "∅" for the operator FRANCE TELECOM reserved in the use of the universal service while the Digits "1,2,4,6,8,9" competitors Allocated for long distance calls can be; the called number Z, as well as the possible code, is entered via the Terminal equipment sent to the telecommunications center, to which the terminal is connected; the telecommunications center examines whether a redirection condition is met; this will be the case if the head office the presence of the said selected code detected; this can also be the case if - in the absence of the Codes - the telecommunications center after searching a database, it finds that the number of the calling Participant registered in the base as a participant accordingly is, whose connections are all to a certain intermediate station to be redirected.

If the redirect condition is met, there is a registration for the call with the destination of the number Y (the intermediate station), which thus is replaced by the called number Z; the possibly Coded number Z is made using a parameterizable service of the D channel connecting the central office with the intermediate station ISDN connection via transfer the control center to the intermediate station; the intermediate station recorded (and decodes, if necessary, the so called number Z and takes a conversation registration herself at the exit to the called subscriber Z; if the called Participants available the two calls are connected to the different nodes of the network, including the one formed by the intermediate station Node.

So there is after this first aspect (or application) the invention in a manufacturing process telecommunications between any calling party with the number X and any called end user the number Z, the calling party and the called party Subscriber connected to an automatic telecommunications network are a first pass node and a second pass node contains (the first and second pass nodes are monitored and / or belong to two different units or operators), which is marked that - with the Aim to get the said telecommunications from the first to the second To redirect nodes, which forms an intermediate station (which is assigned a phone number Y), the first and the second Knot over an ISDN line are connected - the Number Z of the called end user via the D channel for signaling the ISDN line is transmitted from the first node to the second node; is preferred the phone number in the area of the first transit node mentioned Y of the second node or the intermediate station, which is dependent from a selected code sent by the calling party A chosen will replace the number Z of the called subscriber set.

In this first application of the invention the calling subscriber with the network via an analog end line or about a digital end line must be connected.

In a second application and according to a second aspect, the invention proposes a telecommunication method between a first subscriber with a call number (designated as X), which is connected to an ISDN network, and a third subscriber (or called subscriber or end subscriber), whose telephone number is noted as Z (and which is or is not connected to the ISDN network), to be used and carried out with a number (noted as Y) of a second intermediate subscriber (or station) who is connected to the ISDN network , automatically in place of the number Z of the called end part is set and the named number Z of the called end user via the D channel of the ISDN network via one of the optional teleservices for setting up a call (example: subaddress or signaling from user to user) to the second user (or the called intermediate station) ) is transmitted.

• a – wählt ein anrufender Teilnehmer auf der Tastatur eines Endgerätes die Nummer Z eines angerufenen Teilnehmers, für den eine Nachricht M bestimmt ist, wobei das Endgerät über eine Schnittstelle vom Typ S an ein ISDN-Telekommunikationsnetz angeschlossen ist,
• b – wird die Nummer Z des angerufenen Teilnehmers vorzugsweise über ein Codierungsmittel codiert und wie die Nachricht M an eine erste Vermittlungszwischenstation oder Dienstanbieter übertragen,
• c – decodiert (oder erfaßt) die erste Zwischenstation mit Hilfe eines Decodierungsmittels die Nummer Z des Angerufenen und überträgt die Nachricht M, im Allgemeinen über eine zweite Zwischenstation oder Betreiber, an den angerufenen Teilnehmer; die Nummer X des Anrufers wird über den D-Kanal zur Signalisierung des ISDN-Netzes, über den Standarddienst zur Identifikation des Anrufenden der ISDN-Netze direkt an die erste Zwischenstation übertragen.

In this second application:

• a - a calling subscriber dials on the keyboard of a terminal the number Z of a called subscriber for whom a message M is intended, the terminal being connected to an ISDN telecommunications network via an S-type interface,
• b - the number Z of the called subscriber is preferably encoded via a coding means and, like the message M, transmitted to a first intermediary or service provider,
• c - decodes (or detects) the first intermediate station using a decoding means the number Z of the called party and transmits the message M, generally via a second intermediate station or operator, to the called party; the number X of the caller is transmitted directly to the first intermediate station via the D channel for signaling the ISDN network, via the standard service for identifying the caller of the ISDN networks.

• – sind die Mittel zum Codieren der Nummer Z des angerufenen Teilnehmers vollkommen digital und können, bei der zweiten Anwendung, in die Schnittstelle (vorzugsweise in Form von Software) des Endgerätes des anrufenden Teilnehmers integriert werden; bei der ersten Anwendung sind die Mittel zum Codieren der Nummer Z in die Telekommunikationszentrale des Netzes integriert, die über die ISDN-Leitung mit der Zwischenstation verbunden ist;
• – wird ein (ausgewählter) Code A (alpha) zur Identifikation des ersten und/oder des zweiten Vermittlers aus einer vorbestimmten Liste von ausgewählten Codes von (ersten und/oder zweiten) Vermittlern ausgewählt; die Auswahl erfolgt durch den anrufenden Benutzer, der auf der Tastatur seines Endgerätes oder aber automatisch über die in das Endgerät integrierte Schnittstelle den ausgewählten Code wählt.

According to preferred embodiments of the invention:

• - The means for coding the number Z of the called subscriber are completely digital and can, in the second application, be integrated into the interface (preferably in the form of software) of the terminal of the calling subscriber; in the first application, the means for coding the number Z are integrated in the telecommunications center of the network, which is connected to the intermediate station via the ISDN line;
• A (selected) code A (alpha) for identifying the first and / or the second agent is selected from a predetermined list of selected codes from (first and / or second) agents; the selection is made by the calling user, who dials the selected code on the keyboard of his end device or automatically via the interface integrated in the end device.

In the case of a telephone connection the message M is a voice message.

According to the invention, one or other of the two complementary Services (or fields) of the D-channel of the ISDN network used from a suitable subscriber terminal (S interface) and of course about that Telecommunication center of the network over ISDN with the intermediate station connected, can be parameterized, namely the subaddress service or the signaling service from user to user.

• – wird vor der Übertragung der Nummer Z des angerufenen Endteilnehmers die Länge L der Nummer Z berechnet und wird vor der Übertragung der Nummer Z eine für die Länge L repräsentative Information übertragen;
• – wird erst nachdem verifiziert worden ist, ob die Nummer des angerufenen Endteilnehmers verfügbar ist, die Verbindung zwischen dem ersten anrufenden Teilnehmer und dem dritten Endteilnehmer mittels des Zwischenteilnehmers hergestellt.

According to preferred forms for carrying out the processes according to the invention:

• - the length L of the number Z is calculated before the transmission of the number Z of the called subscriber and before the transmission of the number Z, information representative of the length L is transmitted;
• - After it has been verified whether the number of the called end user is available, the connection between the first calling user and the third end user is established by means of the intermediate user.

• – im Falle einer Telefonendeinrichtung: einem Schnittstellenmodul mit einem Telefonhörer und beispielsweise einem Lautsprecher,
• – einem Schnittstellenmodul mit dem ISDN-Netz,
• – einer Tastatur oder Eingabeeinheit und vorzugsweise einem Anzeigegerät oder einer Anzeigeeinheit,
• – einem Benutzer-Schnittstellenmodul, das mit den Eingabe- und Anzeigeeinheiten verbunden ist,
• – einem Hauptmodul zur Verarbeitung oder Steuerung der Endeinrichtung, das über Leitungen mit dem Benutzer-Schnittstellenmodul, mit dem Schnittstellenmodul mit dem ISDN-Netz sowie mit dem Schnittstellenmodul mit dem Hörer verbunden ist, und das den Betrieb der Endeinrichtung überwacht,

wobei die Endeinrichtung ein Verarbeitungsmittel und eine Speichereinheit umfaßt, die eine Rufnummer Y einer Zwischenstation oder zweiten Teilnehmers enthält, wobei das Verarbeitungsmittel ein Mittel zum Ersetzen einer durch den Benutzer verlangten Nummer Z durch die in der Speichereinheit gespeicherte Nummer Y enthält; vorzugsweise weisen die genannten Verarbeitungsmittel ein Mittel zum Codieren oder Transformieren (insbesondere durch Teilung oder Schneiden) der verlangten Nummer Z des Endteilnehmers in eine oder mehrere Nachrichten auf, wobei die Endeinrichtung vorzugsweise Mittel zum Berechnen der Länge der durch den Benutzer verlangten Endteilnehmernummer enthält.The invention also consists in providing a digital telecommunications terminal (and / or subscriber device with a plurality of terminals and at least one private switching center), in particular a telephone terminal, with:

• In the case of a telephone terminal: an interface module with a telephone receiver and, for example, a loudspeaker,
• - an interface module with the ISDN network,
• A keyboard or input unit and preferably a display device or a display unit,
• A user interface module which is connected to the input and display units,
• A main module for processing or controlling the terminal device, which is connected via lines to the user interface module, to the interface module with the ISDN network and to the interface module with the receiver, and which monitors the operation of the terminal device,

the terminal comprising processing means and a storage unit containing a call number Y of an intermediary or second party, the processing means including means for replacing a number Z requested by the user with the number Y stored in the storage unit; the said processing means preferably have a means for coding or transforming (in particular by dividing or cutting) the required number Z of the end user into one or more messages, the terminal device preferably containing means for calculating the length of the end user number requested by the user.

The invention also provides a system for telecommunications between a calling party number X and a called end party number Z, in which the Calling subscriber uses a terminal according to the invention, which, like an intermediate station, is connected to an ISDN network, and in which the intermediate station has means for detecting (and / or decoding) the called end number, which is via a parameterizable service (examples: subaddress and Signaling from user to user) of the D channel for signaling the ISDN network to which it is connected is transmitted.

In a telecommunications system according to the second application of the invention, the calling terminals or Stations each with a device for replacement and / or Coding the called number equipped, the following also referred to as "dialer" (hereinafter TDN) becomes; this device takes over the voice connection registration of the calling customer and transmits it automatically to the intermediate station or the communication service provider; the server or the switching device with which this intermediate station is equipped, has a device for decoding and / or Recognize the number of the called subscriber based on the calling subscriber's terminal equipment has been encoded, the device for decoding and / or for detection subsequently as an "indirect Call Manager "(hereinafter GAI) is referred to; this device exploits the call registration of the calling subscriber to access them to the organs to control or the entrances to be returned at the exit of the intermediate station (communication service provider) and about linking of the two connections customer / service provider on the one hand and service provider / operator or service provider / called end user on the other hand.

The second application of the invention allows also an operator, the owner or operator of a first network (for example, a first national area), one with the the aforementioned decoding means equipped intermediate station to attach and to a second network to connect (to Example of a second national area) to look at the second to establish national territory as a telecommunications service provider.

The numerous, through the invention Benefits provided by the following description refers to the accompanying drawings, which are without any restrictive character preferred embodiments the inventive method and devices show, more understandable.

Unless otherwise stated, become functionally and / or structurally identical or similar Elements in the different figures by the same numbers or Letters.

1 shows schematically the components of a telecommunications system according to the second application of the invention.

2 schematically illustrates the components of a telephone terminal according to the second application of the invention.

3 shows a communication system according to the first application of the invention.

4 schematically illustrates the functional steps of the TDN device.

5 shows the functional steps of the GAI device in a schematic manner.

Three variants of the invention are described in more detail below; a first variant is based on rerouting a connection from a first pass-through node (of a first operator), such as a telephone exchange, to a second pass-through node (belonging to a second operator) forming an intermediate station, the first and the second pass-through node being via an ISDN line is connected, the D channel of which is used to transmit the number Z of the called end user from the first node to the second node; two variants of the second application of the invention use the transmission of the number Z of the called end user (reference symbol 8th . 1 ) via the D channel for signaling the ISDN network (reference number 2 ) to which the calling subscriber and the intermediate station 4 are connected.

In the event that the same intermediate station is systematically used, to which all calls are routed, the use of the invention will be completely "transparent" to the user, ie without changing any of its usage habits, in which case the user can use it Only activate or prevent the call forwarding or replacing function, for example using a function key on his terminal device intended for this (binary) dialing; in other embodiments of the invention, the user can opt for the forwarding via an operator who is selected from a list of predetermined ones Agents is selected, their phone numbers and this data in a memory area (reference 14 . 2 ) or a file of the terminal device or the interface of the device with which the calling station is equipped can be stored; in this case, the user can, for example, select the agent that he wants to use to redirect his connection by selecting a code representative of his choice of an agent from the predetermined agent list or by typing on the keyboard.

FIRST VERSION

• – vier Knoten 50, 51, 52, 53, die über Leitungen 60 verbunden sind und die zu einem ersten Betreiber gehören,
• – einen Knoten 54, der über eine ISDN-Leitung 70 und über eine Leitung 9 mit den Knoten 50 bzw. 53 verbunden ist und der zu einem zweiten Betreiber gehört,
• – einen Knoten 55, der ebenfalls über eine ISDN-Leitung 70 mit dem Knoten 50 und über eine Leitung 9 mit dem Knoten 53 verbunden ist und der zu einem dritten Betreiber gehört.

With reference to 3 points the public telecommunications network 100 to which the calling subscriber 1 and the called party 8th are connected, several to each other connected through nodes on:

• - four knots 50 . 51 . 52 . 53 that over lines 60 connected and belonging to a first operator,
• - a knot 54 who is on an ISDN line 70 and over a line 9 with the knots 50 respectively. 53 connected and belonging to a second operator,
• - a knot 55 who is also on an ISDN line 70 with the knot 50 and over a line 9 with the knot 53 is connected and belongs to a third operator.

Depending on whether the calling party wants his connection to be through the node 54 or over the knot 55 running, he will choose an appropriately chosen code A (for example "1" to the node 54 of the second operator, and "2" to select the node 55 of the third operator).

For this purpose the code A is sent via the calling terminal 1 (as well as the called number Z) via the end line 61 to the switchboard 50 transfer; after the TDN module (reference number 5 ) the headquarters 50 The central unit provides the selected code A, which in the example is equal to 2 50 a conversation registration with which the station 4 forming knot 55 forth, whose subscriber number is Y, transmits the called end number Z over the D channel of the ISDN line between the central office 50 and the knot 55 to the intermediate station 4 (or knot 55 ), as described in more detail in the second and third variants below.

After making one over the knot 50 . 55 and 53 ongoing connection, the message M is sent over the appropriate lines from the caller 1 to the called party 8th transfer.

In modern public networks, the present device can take full advantage of an intelligent network type architecture. Because with this type of architecture, the switching nodes and the other resources of the network are controlled by one or more possibly remote computers (which are referred to in the FRANCE TELECOM network as a Service Control Point or "SCP"; a special SCP, which is called a network -SCP or N-SCP is assigned to control the execution of a given service type in real time; the N-SCP supports the software corresponding to the logic of the service in question), preferably via control channels No. 7 of the ITU-T and subject to adjustment according to the public switchboards or other resources In an intelligent network architecture applied to the present device, the switch plays 50 the role of the service access switching center ("Commutateur d'Accès au Service") (CAS: triggers the processing of the call via the network SCP). The N-SCP now controls the process of replacing the number Z with the number Y and inserting it and the coding of the number Z in a suitable supplementary service within the D channel.

SECOND AND THIRD VERSION

After these two variants, the TDN of the terminal device waits 1 (Step 100 . 4 ) if the calling subscriber picks up the telephone receiver (reference symbol 20 . 2 ) of the terminal equipment 1 decreases, on dialing the required end number Z.

If this is completely selected (test 101 ), the TDN requests (step 104 ) an ISDN connection with identification of the calling subscriber to the communication service provider 4 whose number Y is known from the TDN. This connection establishment uses standard services of the D channel for signaling the ISDN networks.

The TDN feeds the number Z of the the calling individual requested final call partner in a predefined coded form, which is known from the GAI, into the D channel.

The service provider now has all Information that enables him to follow the request of the individual customer, namely his identity and the Number of the final interlocutor.

Upon receipt (step 200 . 5 ) an ISDN call registration from the service provider, the GAI checks the intermediate station 4 (Test 201 ) whether this also takes place in the identification mode of the caller; if this is not the case, the service provider provides 4 do not follow the registration (step 202 ); if so, the GAI requires comparison (step 203 ) the calling number with the list of authorized customers of the service provider.

If the calling number X is actually the Authorized number Is a customer, then the GAI decides to continue.

When the number Z, in coded or non-coded form, has reached the GAI, it decodes it (steps 209 and 212 ) and transfers them to the organs for controlling the exit accesses of the service provider; the connection from Y to Z is established (test 213 ), the GAI requires linking (step 215 ) of the customer / service provider and service provider / operator connections 7 (or service provider 4 / called subscriber 8th ); otherwise the GAI returns the matter to X (step 214 ).

The use of the second or third variant for carrying out the invention, in which the D channel is used to signal the ISDN network in order to send messages which are representative of the number Z of the called end subscriber from the calling subscriber to the intermediate station transferred has the advantage that the opening of the conversation between the calling subscriber and the intermediary via the B voice channel of the ISDN network (which triggers the start of the charging of the calling subscriber) only takes place when the end subscriber can be reached, ie after checking the connectivity via the device installed at the intermediate station. This applies to ISDN networks that do not take into account the parameterizable additional services on the D channel (such as the subaddress or the signaling from user to user).

SECOND VERSION

This embodiment uses the supplementary one Service "subaddress" of the ISDN network to the number Z of the end user from the calling user X to the first To direct intermediary Y.

Define the international standards the supplementary "Subaddress" service a field of up to 40 decimal digits, which is the number of the called party the public selection plane complete. This size currently allows everyone Public telephone number selection plane all countries transferred to.

So it is enough for the TDN supplementary Service to use the number Z of the called end user up to the communication service provider.

This for establishing a connection between the calling party and the end party required information so runs over the D channel (for the message for establishing an ISDN connection); using the B channel of the ISDN would open a voice connection between X and Y to transfer the number Z without knowing whether the calling subscriber Z will pick up; so that would calling subscribers any connection attempt, including the unsuccessful or ineffective attempts, billed. This There is no disadvantage in the second and third variants of the invention (the use of the sub-address is free in France); there is another significant consequence of using the D channel in a higher one reliability the transfer the number Z because the B channel is much more sensitive to noise from anyone Art is considered the D channel, which is only used for the transmission of digital signals via secured Telematics protocols is intended.

In the national versions the ISDN networks, the field of the subaddress is generally based on limits a number of decimal digits less than 40; for example, the sub-address in France is only 4 decimal digits limited. This limit is now inadequate to each number worldwide public selection plane transferred to. In such cases, fits the second embodiment the size restrictions the subaddress in the following way.

Nsa (Nsa> 0) is the maximum number of decimal digits, which can contain the subaddress of a given ISDN network.

The device of the calling terminal uses multiple consecutive connection requests, to the full number of the called subscriber to the service provider. An analog (supplementary) Device on the part of the service provider makes the connection when this number has been received in full. In this way one avoids counting the telephone charges for a connection, which is established in the ISDN networks in which the use the subaddress is free of charge (example: France).

For example, the first two digits of the subaddress of the first connection establishment message the length (for example, expressed in decimal digits and, for example, between 1 and 99) is the number of the called subscriber. This is how the analog device knows on the part of the service provider after how many manufacturing attempts to make the connection. It is a coding close to the standardized encoding BER ("Basic Encoded Rules"), which is in the upper Layers of the OSI model is used (recommendation X209 of the ITU-T (International Telecommunication Union or Ex-CCITT: Comite Consultatif International du Telephone et du Telegraphe) or ISO standard (International Standard Organization or International Organization for Standardization) 8825). With the latter you have a coding (type, length, value), while here because you have a single value type to be encoded (phone number) has a coding of the type (length, Value) is sufficient.

If Nte is the number of attempts to establish a connection, if L is the number of decimal digits of the number Z of the called subscriber (ie their length) and if E (n) denotes the complete part of the integer n, then Nte = E ( [L + 1] / Nsa) + 1. The parameter L was the first to reach the device on the part of the first mediator, so that it is possible to calculate Nte. For all requests to establish a connection that originate from the same calling party X (test 204 ), except the last (Nth) according to test 206 , the GAI requests the return (step 207 or 211 ) a negative receipt (release) on the request to establish the connection, what (after the waiting time 208 ) enables the very quick connection (by using only the D channel) of the successive Nth requests for production.

The use of the service for identifying the calling subscriber of the ISDN networks is essential in order to route Z to the first operator, since otherwise ambiguities may arise. Because two different calling participants who would like to reach Y at the same time could not be distinguished by the GAI. The latter would reconstruct a called end subscriber number Z 'from the number fragments that exist in the subaddresses filled in by the two calling subscribers. The identification of the calling subscriber, on the other hand, enables the sub-addresses received to be assigned to the same sender.

Let's take a called number as an example Z with nine digits (L = 9; let's take Z = 9 87 65 43 21) and one maximum subaddress length equal to four digits (Nsa = 4). On the part of the TDN, it is necessary to initiate three consecutive telephone connections. The the first two fail, while the third to success leads and possibly (if, for example, the number Z is not used, see above) the opening of the B channel allows, whereby the voice connection and the start of their fee calculation is enabled.

In this example, the first contains Telephone connection from X to Y the subaddress (0, 9, 9, 8). The The first two digits represent the length of the number called Z represents d. H. here 09. The last two digits are the two first "digits" (decimal digits) the number Z.

The second telephone connection from X to Y contains the subaddress (7, 6, 5, 4).

The third telephone connection from X to Y contains the subaddress (3, 2, 1).

The mechanism so described is perfectly adapted to the ISDN telephone systems, which the Selection Directe à I'Arrivée ("extension") (or SDA: one Manage number X per internal subscriber set). With the telephone systems, those who do not manage the extension (SDA) become different internal subscriber sets from the ISDN network as with a single one Number X provided "seen" ambiguity occurs when two internal telephones use the Call the first operator at the same time. Because it will appear have all requests to make connections from one and the same number X, and the first broker becomes a request from a first telephone set AA not from requesting a second one Differentiate telephone set BB of the same calling station can. This leads to reconstruction errors of number Z if L + 2 is exactly larger as Nsa. These ambiguities can be resolved by that the Coding of the sub-address is changed as described above It is then sufficient, for example, as the first digit of everyone's subaddress Requests to manufacture the same internal telephone feed a drawn digit between 0 and 9. Under these Conditions increases the number of manufacturing requests that before the actual Establish the useful telephone connection are required, however up to ten different internal telephones the first operator call at the same time. In the previous example one finds Nte = 4 requests for production (for a number with nine digits and a subaddress with a maximum of four digits) instead of 3.

The means for coding the called number in successive messages for transmission over the Subaddress can can be freely selected from the collection of coding techniques. The "direct" coding method described above is not the only possible.

If a private automatic switching device (designated by PABX) is used as an interface ( 3 ) ( 1 ), the mechanism for processing and coding the called number can then be used in software form in the control unit ("Unite de Commande", UC) of the PABX. This mechanism is in a function block called TDN (or coding device with 5, 1 and 2 ) integrated.

• – der Unite de Commande („Steuereinheit"), welche das Wählen, die Fakturierung und die weiterentwickelten Telefonfunktionen, eventuell mittels des D-Protokolls steuert;
• – dem „Reseau de Connexion" („Verbindungsnetz") (RCX), welches das Verbindungsglied zwischen den eingehenden und den ausgehenden Leitungen, sogar zwischen Leitungen gleicher Art ist (Beispiel: zwei interne Leitungen für eine Verbindung in ein und derselben Station oder zwei ausgehende Leitungen bei der Verknüpfungsfunktion von zwei externen Verbindungen).

A PABX essentially consists of two function blocks:

• - the Unite de Commande ("control unit"), which controls dialing, billing and the further developed telephone functions, possibly using the D protocol;
• - The "Reseau de Connexion"("ConnectionNetwork") (RCX), which is the link between the incoming and outgoing lines, even between lines of the same type (example: two internal lines for a connection in one and the same station or two outgoing Lines in the linking function of two external connections).

At the request of a dedicated body, the UC stores the requested end number Z and its length (expressed in number of digits), which it calculates as explained in detail above (step 102 ).

Is Nsa the maximum length of the subaddress and is (test 103 ) Nsa less than (L + 2), the number Z is chopped (step 106 ): the (Nsa - 2) first digits, then the following Nsa etc. until all digits from Z have been used.

• – der Länge L der Nummer Z (in Ziffernanzahl);
• – dann der (Nsa – 2) ersten Ziffern der Nummer Z.

The UC now requires a telephone connection with identification of the caller to the first operator and with feeding (steps 107 and 108 ) in the subaddress field:

• - the length L of the number Z (in number of digits);
• - then the (Nsa - 2) first digits of the number Z.

This request will be released (step 110 ) acknowledged by the GAI. The UC now requests a new connection that is identical to the first one, but using (step 111 and 108 ) of the following Nsa digits from Z as Un teradresse. This new request is acknowledged by an approval.

This iterative process continues until (Test 109 ) all digits of Z have been used. The last iteration is not acknowledged by a release; the GAI remains within the limits permitted by the ISDN network used (timeout) during the waiting time (step 112 ) making the connection from Y to Z.

The analog device on the part of first intermediary (referred to as GAI) can now manufacture the connection on the B channel allow what the voice connection with the final discussion partner (with the number Z) enables provided that a Voice connection (ISDN, telephone network, over leased line [intermediate transmission] or about any other means) between the first intermediary and this one Endgesprächspartner has been established (link of two voice connections).

With this mechanism is one Attempted connection at a given time with the not using Extension (SDA) equipped multi-point systems possible. In such special cases can the TDN any competition request from another internal subscriber set (of the same calling station) to the first operator. If the ongoing indirect connection request by the first operator Fulfills (Connection, communication) or rejected (failure to reach Z) the next one waiting to be processed by the TDN. The use of the D channel of the digital network for All of these phases of connection establishment enable very short cycle times sure. The other, non-extension (SDA) The procedure is to insert one for the internal body representative Digit, for example decimal digit, in the coding of the number Z.

The technical means that these second variant can form also in ISDN telephone devices be used.

• – dem Modul 18 zum Verwalten der S-Schnittstelle (Benutzerschnittstelle der ISDN-Netze) des Netzes 2;
• – dem Modul 19, welches für die Telefon- und Akustikfunktionen zuständig ist: Codieren und Decodieren der empfangenen Sprachsignale von und/oder zu einem Hörer 20 und eventuell einem Lautsprecher 21 (Digital-/Analog-Umsetzung), Erzeugen einiger akustischer Signale für die Signalisierung der analogen Netze;
• – dem Benutzer-Endgerät-Dialogmodul 12: Die üblichen Tasten der analogen Telefonapparate sind durch Funktionstasten ergänzt, welche ermöglichen, die ergänzenden Dienste der ISDN-Netze zu aktivieren oder auf Funktionen angereicherter Telephonie einer PABX zuzugreifen.

These are usually formed by the following three function blocks (see 2 ):

• - the module 18 to manage the S interface (user interface of the ISDN networks) of the network 2 ;
• - the module 19 , which is responsible for the telephone and acoustic functions: encoding and decoding of the received speech signals from and / or to a listener 20 and possibly a speaker 21 (Digital / analog conversion), generating some acoustic signals for signaling the analogue networks;
• - The user terminal dialog module 12 : The usual keys of the analogue telephone sets are supplemented by function keys, which make it possible to activate the supplementary services of the ISDN networks or to access functions of enriched telephony of a PABX.

The module is added to these three modules 17 to manage the connections that the unit controls; these modules and the input-output peripherals (units) (keyboard 10 and display device 11 ) as well as the converters 20 . 21 are over lines 23 connected.

• – die angerufene (über die Tastatur 10 gewählte) Nummer Z über die Benutzer-Endgerät-Dialogschnittstelle 12 durch die Nummer Y des ersten Vermittlers zu ersetzen;
• – die Länge dieser Nummer Z zu berechnen und daraus die Anzahl von erforderlichen Aufbauversuchen (Nte) nach dem zuvor angegebenen Algorithmus abzuleiten;
• – von dem Modul 17 zum Verwalten der Verbindungen den Aufbau von Verbindungen (über die Schnittstelle 18) mit Identifikation des Anrufenden zum ersten Vermittler und, wie weiter oben beschrieben, unter Ausfüllen der Unteradresse zu verlangen, um die gesamte Nummer Z (eventuell in aufeinanderfolgenden Teilen) zu übertragen.

Under these conditions, the TDN can take the form of a new processing module 13 be used, which is between the user terminal dialog interface 12 and the module 17 to manage connections. His job now is to do the following:

• - the called (via the keyboard 10 dialed) number Z via the user terminal dialog interface 12 to be replaced by the number Y of the first agent;
• - calculate the length of this number Z and derive from it the number of required construction attempts (Nte) according to the previously specified algorithm;
• - from the module 17 to manage the connections, the establishment of connections (via the interface 18 ) with identification of the caller to the first operator and, as described above, by filling in the sub-address in order to transmit the entire number Z (possibly in successive parts).

The GAI or decoder (reference number 6 . 1 ) can be used in software form on an ISDN PABX. If the latter supports the function for automatically linking the connection, the PABX can now perform the task of the organ for controlling the access to the network 9 (STN, ISDN, leased line or other) at the exit of the service provider 4 take over and can therefore serve as an interface for the outgoing telephone networks, which enable access to the called final call partner under number Z.

The software used in the GAI must with the first request to set up the calling subscriber under the number X read the subaddress. The first two digits are the first read as the length give the number Z, which enables - if the maximum length the subaddress Nsa is known - the number Nth of successive, Determine attempts to build from X (see above).

The rest of the subaddress is called first digits of Z saved.

If Nsa (test 210 ) is less than (L + 2), the GAI must now wait for the following requests to build up X in order to complete the number Z. The GAI therefore does not accept the requests to build up X (release) as long as Z is not completely known.

• – Nichtvorhandensein des Besetztsignals des Teilnehmers Z (wenn STN);
• – Abnehmen des Teilnehmers Z vor einer Dauer (Tmax), die der maximalen Dauer entspricht, vor welcher eine Anfrage zur Herstellung einer ISDN-Verbindung quittiert werden muß (Freigabe oder Verbindung).

If Z is completely known (Nth. Request to set up), the GAI requests the opening of the B channel to enable the voice connection if some conditions are met. This Bedin are:

• - absence of the busy signal of subscriber Z (if STN);
• - Acceptance of subscriber Z before a duration (Tmax) which corresponds to the maximum duration before which a request to establish an ISDN connection must be acknowledged (release or connection).

This last mechanism enables to avoid that User X has an ISDN connection is attributed to the first intermediary if he does not reach Z. can.

The communication protocol points 4 essential steps to:

step 1 : Preparation of the inquiries about the setup at the TDN;

The TDN creates the request (s) (the Parameters Nte) described above for the production of connections to the first operator: The number of the first operator is set to the place of the called number Z is set and the number Z is in one or more subaddress fields locked in.

step 2 : From TDN to GAI (from X to Y);

• a/ Identifikation des anrufenden Teilnehmers (Nummer X);
• b/ der angerufene Teilnehmer ist der erste Vermittler (Nummer Y);
• c/ Unteradresse, welche die vollständige Nummer Z und einen Teil davon enthält.

The TDN requires an ISDN connection with the following features:

• a / Identification of the calling subscriber (number X);
• b / the called party is the first operator (number Y);
• c / sub-address, which contains the full number Z and part of it.

If Nte (Nte> 1) consecutive requests to connect due to insufficient subaddress length are required to to transfer entire number Z, so the GAI gives the (Nte - 1) first requests to manufacture (which he thanks to the number known to him X of the calling party does not identify [feature above] instead of (release).

If those from the same source originating Nth requests for connection establishment have been received, has the GAI over all information to connect from the first participant X to manufacture to the participant under the number Z.

step 3 : Reconstruction of number Z;

The GAI has the full number Z, which he obtained if necessary by concatenating the successively Subaddresses reconstructed when the maximum length of the subaddress used in the ISDN network not possible to transfer the entire number Z in a single manufacturing request.

step 4 : Establishing a connection with Z on the one hand and source X on the other;

The GAI now requires a voice connection between the agent and the participant under number Z.

If subscriber Z is busy (Case of the STN), the GAI gives the busy information about the appropriate one D protocol message (release) immediately to the source X back.

• – Der Teilnehmer Z nimmt vor einer als Tmax bezeichneten Dauer ab, die genau unter der maximalen Dauer liegt, vor welcher die letzte Anfrage zur Herstellung einer Verbindung von X zum Vermittler über das D-Protokoll (Freigabe oder Kommunikationsverbindung) in dem von X zu Y verwendeten ISDN-Netz quittiert werden muß. Unter diesen Bedingungen werden die beiden Sprachverbindungen von X zu Y einerseits und von Y zu Z andererseits verknüpft, um eine durchgehende Verbindung von X nach Z zu ermöglichen. Der Prozeß des Verknüpfens von zwei Sprachverbindungen erfordert keine eingehende Beschreibung, da zahlreiche vorhandene Vorrichtungen diesen unterstützen (beispielsweise: einige PABX, die mit einer neuen Softwareversion ausgestattet sind).
• – eine Dauer Tmax (wie sie oben definiert ist) läuft an dem GAI ab, ohne daß der Teilnehmer Z abgenommen hat. Ab diesem Zeitpunkt wird die letzte Anfrage zur Herstellung einer Verbindung von X zu Y über das D-Protokoll quittiert (Ablehnung), wodurch vermieden werden kann, daß dem anrufenden Benutzer eine Verbindung zugeschrieben wird.

If subscriber Z can be reached, two cases can occur:

• - The subscriber Z decreases before a duration referred to as Tmax, which is exactly below the maximum duration before which the last request to establish a connection from X to the intermediary via the D protocol (release or communication connection) in that from X to Y used ISDN network must be acknowledged. Under these conditions, the two voice connections from X to Y on the one hand and from Y to Z on the other are linked to enable a continuous connection from X to Z. The process of linking two voice connections does not require a detailed description, since numerous existing devices support them (for example: some PABX that are equipped with a new software version).
• A duration Tmax (as defined above) expires on the GAI without the subscriber Z having decreased. From this point in time, the last request to establish a connection from X to Y is acknowledged via the D protocol (rejection), which can prevent a connection from being ascribed to the calling user.

THIRD VERSION

This third embodiment uses the supplementary one Signaling service from user to user "the ISDN networks to get the number Z of the called end user from the requesting subscriber (calling party) X to the first operator Y.

This third variant is the second, Variant described above similar and has the same advantages.

The supplementary service “Signaling from user to user " in a field with a maximum of 128 characters (bytes) that is used in the messages for Establishing or releasing a D-protocol call becomes.

The TDN uses this complementary service (called MINIMESSAGE in France) to transfer the number Z of the called subscriber to the communication service provider wear.

This information, which is necessary for the production of a Connection between the calling party and the called party End subscriber is required, so runs over the D channel.

The economic advantage of this embodiment arises from the fact that in many countries the Supplementary costs Service “Signaling from user to user "very low are.

For national versions ISDN networks have the maximum number of characters for signaling from user to user under 128. For example in France is the signaling from user to user in its "user-to-user facility" variant with only 10 characters and in its "user-to-user" variant Information " 35 or 67 bytes limited (see STAS Numbers, Issue 3, Volume 4, Paragraph 7). This limit is insufficient to cover any number of public worldwide selection plane transferred to. In such cases fits the invention the size restrictions signaling from user to user in the following way and way that to the previously in the second embodiment described similarly (if not identical).

Nmm (Nmm> 0) is the maximum number of characters the signaling from user to user of a given ISDN network may contain.

As in the second embodiment the TDN uses multiple consecutive requests to manufacture a connection to complete Transfer the number of the called subscriber to the service provider. The GAI will only establish the connection when this number has been received in full has been.

For example, in a similar manner to that for the The second variant described the first two characters the signaling from user to user of the first message Making the connection the length the number of the called subscriber (e.g. expressed in decimal digits and therefore between 1 and 99). So the GAI knows after how many attempts to make the connection got to.

If the number of attempts to connect is when L is the number of decimal digits is the number Z of the called end user and if E (n) is the complete Denoted part of n, we now have Nte = E ([L + 1] / Nmm) + 1. The parameter L is the first to the device on the part of the first Intermediary arrives so that you allows will calculate Nte. For all connection requests made by one and the same Calling party X, except the last (Nth.), requests the GAI the return a negative receipt (release) for the manufacturing request, to break the connection on the D channel, which is very quick link (exclusive Using the D channel) of successive Nth requests to manufacture allows.

This solution shows that the use of the Service to identify the calling subscriber of the ISDN networks for transferring from Z to the first intermediary is essential as otherwise - as before in terms of described the second variant - there are ambiguities could.

Let's take a called number as an example Z with nine digits (L = 9; let's take Z = 9 87 65 43 21) and one maximum length for the Signaling from user to user of four characters (Nmm = 4). It is required by the TDN, three in a row Initiate telephone connections. The first two don't come accomplished while the third leads to success and possibly (if, for example, the number Z is not used) the opening of the B channel allows, whereby voice communication with the called end user is made possible.

In this example, the first contains Telephone connection from X to Y signaling user to User "0998". The first two Characters represent length the called number Z, d. H. here represents 09. The last two characters are the first two digits of the number Z.

The second telephone connection from X to Y contains the signaling from user to user "7654".

The third telephone connection from X to Y contains the signaling from user to user "321".

As with the second variant, different internal subscriber sets - as far as the telephone equipment that did not agree to the "extension" contract - are seen by the ISDN network as having the same number X. This leads to the occurrence of ambiguities if two internal telephones call the first operator at the same time, which leads to errors in reconstructing the number Z if L + 2 is exactly greater than Nmm. Under these conditions, these ambiguities can be eliminated by coding the signaling from user to user, It is then sufficient to feed a triggered character, for example between "a" and "z", as the first sign of the signaling from user to user for all requests for the production of the same internal telephone set. Under these conditions, the number of increases Manufacturing inquiries made before the actual It is necessary to establish the useful telephone connection, but up to twenty-six different internal telephones can call the first operator at the same time. In the previous example there are Nte = 4 requests for production (for a number with nine digits and a Si gnalization from user to user with a maximum of four characters) instead of 3.

Because the signaling from users is transferring bytes to user it possible encode the number Z in hexadecimal, so that two digits of Z per byte instead of a single digit per byte in the one described above Procedures are included. If you take the previous example again approach (Z = 9 87 65 43 21), contains the signaling of users to user the following chain (in hexadecimal): 09 98 76 54 32 1x (where x is any hexadecimal digit), i.e. 6 bytes instead of previously 11. When signaling from user to user you can be satisfied with 5 bytes even if you look at that the Length one Telephone number is always less than or equal to 10 digits. The signaling from user to user in this case the following chain (in hexadecimal) included: 99 87 65 43 21. This encoding type can enable the number of iterations (successive requests to manufacture) to reduce, possibly to 1, which is the optimal value.

If a private automatic switching center (PABX) is used as an interface ( 3 ) is selected, the mechanism is now used in software form in the "Unite de Commande"("controlunit", UC) of the PABX.

At the request of a dedicated body, the UC stores the called end number Z and its length L (in Number of digits expressed), which she has just calculated.

If Nmm is the maximum length of the Signaling from user to user is and if Nmm smaller than (L + 2), the number Z is chopped up: the (Nmm - 2) first Digits, then the following Nmm etc. until all digits from Z are used have been.

• – der Länge L der Nummer Z (in Ziffernanzahl);
• – dann der (Nmm – 2) ersten Ziffern der Nummer Z.

The UC now requires a telephone connection with identification of the calling subscriber to the first operator and feeding in the signaling from user to user:

• - the length L of the number Z (in number of digits);
• - then the (Nmm - 2) first digits of the number Z.

The UC breaks the connection, after confirmation on the D channel of the construction was received.

The UC is now demanding another connection identical to the first connection, but using the following Nmm digits from Z as a subaddress.

This iterative process continues until all digits from Z have been used.

The analog device on the part of first intermediary (referred to as GAI) can now manufacture the connection on the B channel allow what the voice connection with the final discussion partner under number Z enables provided that between a voice connection is established to the first operator and this final conversation partner has been.

With this mechanism is one Attempted connection at a given time with the not using Extension facilities equipped with direct dialing (SDA) possible. In such special cases the TDN stores every competition request from another internal Subscriber set to the first agent. If the current indirect Connection request fulfilled by the first agent (connection) or rejected (Release), the next can waiting to be processed by the TDN.

The technical means that these form third variant of the invention can also in ISDN telephone terminals be used.

• – die angerufene Nummer Z über die Benutzer-Endgerät-Dialogschnittstelle durch die Nummer des ersten Vermittlers zu ersetzen;
• – die Länge dieser Nummer Z zu berechnen und daraus die Anzahl von erforderlichen Herstellungsversuchen Nte nach dem oben gegebenen Algorithmus abzuleiten;
• – von dem Modul zum Verwalten der Verbindungen das Herstellen von Verbindungen mit Identifikation des Anrufenden zum ersten Vermittler und, wie weiter oben beschrieben, unter Ausfüllen der Signalisierung von Benutzer zu Benutzer zu verlangen, um die gesamte Nummer Z (eventuell in aufeinanderfolgenden Teilen) zu übertragen.

Under these conditions, the TDN can be used in the form of a new module, which is located between the user terminal dialog interface and the module for managing the connections. Its job is, one after the other:

• - to replace the called number Z by the number of the first operator via the user terminal dialog interface;
• - calculate the length of this number Z and derive from it the number of manufacturing attempts required Nte according to the algorithm given above;
• - to request the module for managing the connections to establish calls with identification of the caller to the first operator and, as described above, by filling in the signaling from user to user in order to transmit the entire number Z (possibly in successive parts) ,

The GAI can take the form of a new one Software version can be used on a PABX.

The software using the GAI must with the first manufacturing request of the caller under number X the Read signaling from user to user. The first two characters are read first because they indicate the length of the number Z, what enables - if the maximum length Nmm the signaling from user to user is known - the number Nth of successive attempts to build up starting from X determine.

The remaining signaling of User to user is saved as the first digits of Z.

If Nmm is less than L + 2, so the GAI wait for the following requests to build X to the number Z to complete. The GAI therefore does not allow requests to build X. (Release) as long as Z is not completely known.

If Z is completely known (Nth. Request to set up), the GAI requests the opening of the B channel to enable the voice connection, if some conditions are met. These conditions are identical to the conditions mentioned above with regard to the second embodiment variant.

The connection protocol contains four essential steps to those of the protocol of the second Variant identical or similar (see above).

step 1 : Preparation of inquiries about the setup at the TDN

The TDN creates the request (s) (the Parameters Nte) described above for the production of connections to the first operator: The number of the first operator is set to the place of the called number Z is set and the number Z is into one or more signaling (s) from user to user locked in.

step 2 : From TDN to GAI (from X to Y)

• a/ Identifikation des anrufenden Teilnehmers (Nummer X);
• b/ der angerufene Teilnehmer ist der erste Vermittler (Nummer Y);
• c/ Signalisierung von Benutzer zu Benutzer, welche die vollständige Nummer Z und einen Teil davon enthält.

The TDN requires an ISDN connection with the following features:

• a / Identification of the calling subscriber (number X);
• b / the called party is the first operator (number Y);
• c / signaling from user to user which contains the full number Z and a part thereof.

If Nte (Nte> 1) consecutive requests to connect due to insufficient length the signaling from user to user are required to to transmit the entire number Z so the GAI gives the Nte - 1 first requests to manufacture (which he thanks to the number known to him of the caller X does not identify [feature above] instead of (release).

If those from the same source originating Nth requests for connection establishment have been received, has the GAI over all information to connect from the first intermediary Y to establish the subscriber under number Z.

step 3 : Reconstruction of the number Z

The GAI has the full number Z, which he obtained if necessary by concatenating the successively Signaling from user to user reconstructed when the maximum length of the Signaling from user to user in the ISDN network used does not allow to transfer the entire number Z in a single manufacturing request.

step 4 : Establishing a connection with Z on the one hand and source X on the other:

This step is with step 4 of the protocol previously described for the second embodiment variant.

The second and third variant, which have been described above can simultaneously on the same TDN and the same GAI be used.

The advantage of a simultaneous Use of these embodiments on the same device lies in the adaptation to the technical Features and tariff features of the ISDN network used. Allows for example an ISDN network with the free use of a sub-address a maximum length of 20 digits, the user will use the combined device that of the second variant parameterize the corresponding operating mode.

The processing unit previously referred to as TDN ( 13 ) the terminal device or the device with which the switching station (which is now referred to as GAI) is equipped with a storage unit (reference number 15 . 2 ), in which the maximum number or maximum numbers (previously Nsa or Nmm) of digits (or characters) are stored, which are the messages of the supplementary service subaddress (or signaling from user to user), which at the second variant (or third variant) is used for the transmission of the called number Z.

Claims (10)

Procedure for telecommunications between a calling party and a called party ( 8th ), whose phone number is noted as (Z), characterized in that automatically a number (Y) of an intermediate station ( 4 . 54 . 55 ) connected to the ISDN network ( 2 ) is connected, instead of the number (Z) of the called end user ( 8th ) is set so that the number (Z) of the called end user via the D channel for signaling the ISDN network to the intermediate station ( 4 . 54 . 55 ) is transmitted, which makes a call registration with the destination of the called subscriber (Z) in order to establish a connection between the calling subscriber and the called subscriber if necessary (step 215 ). Telecommunication method according to claim 1, characterized characterized in that when the calling subscriber to the ISDN network is connected, the number of the called end user transmitted from the calling subscriber to the intermediate station being a complementary service of the ISDN network is used. The method of claim 2, wherein the service of Sub-address of the D channel is used to call the number (Z) of the called party transferred to. The method of claim 2, wherein the service of Signaling from user to user is used to get the number (Z) to transfer the called end user. Method according to one of claims 2 to 4, wherein a connection between the calling subscriber and the end subscriber via the Intermediate participants are only produced if they have been verified is that the number of the called subscriber is free. Method according to one of claims 2 to 5, in which before the transmission the number (Z) of the called end user the length (L) the number (Z) is calculated and the intermediate station before transmission the number (Z) information about transmitted the D channel will that for the length (L) representative is. Telecommunication method according to claim 1, characterized in that the calling subscriber has the number (Z) of the called end subscriber ( 8th ) to a first through node ( 50 ), which is connected to the ISDN network, and this first through node ( 50 ) the number (Z) of the end user ( 8th ) via the D channel for signaling the ISDN network to the intermediate station ( 54 . 55 ) transmits. Method according to claim 7, in which the number (Y) of the intermediate station ( 54 . 55 ), which is selected depending on a selected code (A), which is sent by the calling subscriber, in place of the number (Z) of the called end subscriber. Digital telecommunications terminal equipment ( 1 . 3 ), comprising: - one module ( 18 ) an interface with an ISDN network ( 2 ), - a keyboard ( 10 ), - a user interface module ( 12 ), - a main module ( 17 ) to control the terminal device, which is connected ( 23 ) to the user interface module ( 12 ) and to the interface module ( 18 ) is connected and monitors the operation of the terminal, the terminal having a processing means ( 13 ) and a storage unit ( 14 ), which contains a call number (Y) of an intermediate station, the processing means ( 13 ) means for replacing a number (Z), which is entered by the user via the keyboard, by the number (Y) stored in the storage unit and means for transferring the replaced number (Z) using a supplementary ISDN service. System for the telecommunication between a calling subscriber and a called end subscriber with the number (Z), in which the calling subscriber uses a terminal according to claim 9, in which the terminal and an intermediate station to an ISDN network ( 2 ) are connected, the intermediate station comprising: means for recording the called subscriber number (Z) which is transmitted via a supplementary service which is accessible to the user via the D channel for signaling the ISDN network, means for Making a call to the destination of the called party; and means for establishing a connection between the calling party and the called party.